TL;DR
This paper reviews the discovery of high-energy cosmic neutrinos by IceCube, explores potential sources and multimessenger strategies for identifying their origins, and discusses implications for cosmic-ray physics and new physics probes.
Contribution
It provides a comprehensive overview of possible origins of cosmic neutrinos, emphasizing multimessenger approaches and exploring their implications for astrophysics and particle physics.
Findings
IceCube detected high-energy cosmic neutrinos.
Multimessenger data suggest links to cosmic-ray and gamma-ray sources.
Potential to study neutrino properties and new physics.
Abstract
Recently, the IceCube collaboration made a big announcement of the first discovery of high-energy cosmic neutrinos. Their origin is a new interesting mystery in astroparticle physics. The present multimessenger data may give us hints of connection to cosmic-ray and/or gamma-ray sources. We look over possible scenarios for the cosmic neutrino signal, and emphasize the importance of multimessenger approaches in identifying the PeV neutrino sources and obtaining crucial clues to the cosmic-ray origin. We also discuss some possibilities to study neutrino properties and probe new physics.
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